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selftests: forwarding: bridge_fdb_learning_limit: Add a new selftest
Add a suite covering the fdb_n_learned and fdb_max_learned bridge features, touching all special cases in accounting at least once. Acked-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Johannes Nixdorf <jnixdorf-oss@avm.de> Link: https://lore.kernel.org/r/20231016-fdb_limit-v5-5-32cddff87758@avm.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Johannes Nixdorf
Jakub Kicinski
parent
19297c3ab2
commit
6f84090333
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# SPDX-License-Identifier: GPL-2.0+ OR MIT
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TEST_PROGS = bridge_igmp.sh \
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TEST_PROGS = bridge_fdb_learning_limit.sh \
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bridge_igmp.sh \
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bridge_locked_port.sh \
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bridge_mdb.sh \
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bridge_mdb_host.sh \
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283
tools/testing/selftests/net/forwarding/bridge_fdb_learning_limit.sh
Executable file
283
tools/testing/selftests/net/forwarding/bridge_fdb_learning_limit.sh
Executable file
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# ShellCheck incorrectly believes that most of the code here is unreachable
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# because it's invoked by variable name following ALL_TESTS.
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#
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# shellcheck disable=SC2317
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ALL_TESTS="check_accounting check_limit"
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NUM_NETIFS=6
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source lib.sh
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TEST_MAC_BASE=de:ad:be:ef:42:
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NUM_PKTS=16
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FDB_LIMIT=8
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FDB_TYPES=(
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# name is counted? overrides learned?
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'learned 1 0'
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'static 0 1'
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'user 0 1'
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'extern_learn 0 1'
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'local 0 1'
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)
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mac()
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{
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printf "${TEST_MAC_BASE}%02x" "$1"
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}
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H1_DEFAULT_MAC=$(mac 42)
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switch_create()
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{
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ip link add dev br0 type bridge
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ip link set dev "$swp1" master br0
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ip link set dev "$swp2" master br0
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# swp3 is used to add local MACs, so do not add it to the bridge yet.
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# swp2 is only used for replying when learning on swp1, its MAC should not be learned.
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ip link set dev "$swp2" type bridge_slave learning off
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ip link set dev br0 up
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ip link set dev "$swp1" up
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ip link set dev "$swp2" up
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ip link set dev "$swp3" up
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}
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switch_destroy()
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{
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ip link set dev "$swp3" down
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ip link set dev "$swp2" down
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ip link set dev "$swp1" down
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ip link del dev br0
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}
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h_create()
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{
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ip link set "$h1" addr "$H1_DEFAULT_MAC"
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simple_if_init "$h1" 192.0.2.1/24
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simple_if_init "$h2" 192.0.2.2/24
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}
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h_destroy()
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{
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simple_if_fini "$h1" 192.0.2.1/24
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simple_if_fini "$h2" 192.0.2.2/24
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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swp1=${NETIFS[p2]}
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h2=${NETIFS[p3]}
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swp2=${NETIFS[p4]}
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swp3=${NETIFS[p6]}
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vrf_prepare
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h_create
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switch_create
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}
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cleanup()
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{
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pre_cleanup
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switch_destroy
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h_destroy
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vrf_cleanup
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}
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fdb_get_n_learned()
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{
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ip -d -j link show dev br0 type bridge | \
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jq '.[]["linkinfo"]["info_data"]["fdb_n_learned"]'
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}
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fdb_get_n_mac()
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{
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local mac=${1}
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bridge -j fdb show br br0 | \
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jq "map(select(.mac == \"${mac}\" and (has(\"vlan\") | not))) | length"
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}
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fdb_fill_learned()
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{
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local i
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for i in $(seq 1 "$NUM_PKTS"); do
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fdb_add learned "$(mac "$i")"
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done
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}
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fdb_reset()
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{
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bridge fdb flush dev br0
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# Keep the default MAC address of h1 in the table. We set it to a different one when
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# testing dynamic learning.
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bridge fdb add "$H1_DEFAULT_MAC" dev "$swp1" master static use
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}
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fdb_add()
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{
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local type=$1 mac=$2
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case "$type" in
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learned)
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ip link set "$h1" addr "$mac"
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# Wait for a reply so we implicitly wait until after the forwarding
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# code finished and the FDB entry was created.
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PING_COUNT=1 ping_do "$h1" 192.0.2.2
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check_err $? "Failed to ping another bridge port"
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ip link set "$h1" addr "$H1_DEFAULT_MAC"
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;;
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local)
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ip link set dev "$swp3" addr "$mac" && ip link set "$swp3" master br0
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;;
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static)
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bridge fdb replace "$mac" dev "$swp1" master static
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;;
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user)
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bridge fdb replace "$mac" dev "$swp1" master static use
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;;
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extern_learn)
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bridge fdb replace "$mac" dev "$swp1" master extern_learn
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;;
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esac
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check_err $? "Failed to add a FDB entry of type ${type}"
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}
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fdb_del()
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{
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local type=$1 mac=$2
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case "$type" in
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local)
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ip link set "$swp3" nomaster
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;;
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*)
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bridge fdb del "$mac" dev "$swp1" master
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;;
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esac
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check_err $? "Failed to remove a FDB entry of type ${type}"
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}
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check_accounting_one_type()
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{
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local type=$1 is_counted=$2 overrides_learned=$3
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shift 3
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RET=0
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fdb_reset
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fdb_add "$type" "$(mac 0)"
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learned=$(fdb_get_n_learned)
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[ "$learned" -ne "$is_counted" ]
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check_fail $? "Inserted FDB type ${type}: Expected the count ${is_counted}, but got ${learned}"
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fdb_del "$type" "$(mac 0)"
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learned=$(fdb_get_n_learned)
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[ "$learned" -ne 0 ]
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check_fail $? "Removed FDB type ${type}: Expected the count 0, but got ${learned}"
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if [ "$overrides_learned" -eq 1 ]; then
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fdb_reset
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fdb_add learned "$(mac 0)"
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fdb_add "$type" "$(mac 0)"
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learned=$(fdb_get_n_learned)
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[ "$learned" -ne "$is_counted" ]
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check_fail $? "Set a learned entry to FDB type ${type}: Expected the count ${is_counted}, but got ${learned}"
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fdb_del "$type" "$(mac 0)"
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fi
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log_test "FDB accounting interacting with FDB type ${type}"
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}
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check_accounting()
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{
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local type_args learned
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RET=0
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fdb_reset
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learned=$(fdb_get_n_learned)
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[ "$learned" -ne 0 ]
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check_fail $? "Flushed the FDB table: Expected the count 0, but got ${learned}"
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fdb_fill_learned
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sleep 1
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learned=$(fdb_get_n_learned)
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[ "$learned" -ne "$NUM_PKTS" ]
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check_fail $? "Filled the FDB table: Expected the count ${NUM_PKTS}, but got ${learned}"
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log_test "FDB accounting"
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for type_args in "${FDB_TYPES[@]}"; do
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# This is intentional use of word splitting.
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# shellcheck disable=SC2086
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check_accounting_one_type $type_args
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done
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}
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check_limit_one_type()
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{
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local type=$1 is_counted=$2
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local n_mac expected=$((1 - is_counted))
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RET=0
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fdb_reset
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fdb_fill_learned
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fdb_add "$type" "$(mac 0)"
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n_mac=$(fdb_get_n_mac "$(mac 0)")
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[ "$n_mac" -ne "$expected" ]
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check_fail $? "Inserted FDB type ${type} at limit: Expected the count ${expected}, but got ${n_mac}"
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log_test "FDB limits interacting with FDB type ${type}"
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}
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check_limit()
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{
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local learned
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RET=0
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ip link set br0 type bridge fdb_max_learned "$FDB_LIMIT"
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fdb_reset
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fdb_fill_learned
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learned=$(fdb_get_n_learned)
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[ "$learned" -ne "$FDB_LIMIT" ]
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check_fail $? "Filled the limited FDB table: Expected the count ${FDB_LIMIT}, but got ${learned}"
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log_test "FDB limits"
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for type_args in "${FDB_TYPES[@]}"; do
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# This is intentional use of word splitting.
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# shellcheck disable=SC2086
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check_limit_one_type $type_args
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done
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}
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trap cleanup EXIT
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setup_prepare
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tests_run
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exit $EXIT_STATUS
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